PHOTOS: Catastrophic Flooding Washes Across South Carolina

Communities across South Carolina have been slammed with catastrophic, life-threatening flooding throughout the weekend.

Some of the hardest hit areas recorded rainfall amounts higher than 20 inches. Major roadways were closed across the state and Gov. Nikki Haley encouraged people to stay home and avoid any unnecessary travel.

Three people were killed in weather-related flooding vehicle accidents since Friday, Oct. 2, the South Carolina Department of Public Safety reported.

More than 200 swift water rescues have been performed across the state as of Sunday morning according to South Carolina Emergency Management.

Tidal Surge Pushes Water Into Charleston, South Carolina, Neighborhoods

The torrential rainfall developed due to a combination of tropical moisture from Hurricane Joaquin and a non-tropical system.

Tens of thousands of people were without power in South Carolina into Sunday morning.